double bassoon 
noun
A bassoon that is larger and longer than the normal type and sounds an octave lower in pitch.It once fell to my lot to play the double-bassoon in Haydn's Creation.
- poison arrow
- poison arrow frog
- poison bay
- poison berry
- poison book
- poison bulb
- poison-bush
- poison-cart
- poison creeper
- poison cup
- poison dart
- poison dart frog
- poison dogwood
- poisoned chalice
- poison elder
- poisoner
- poison flag
- poison flour
- poison frog
- poisonful
- poison gas
- poison green
- poison hemlock
- poison ivy
- poisonless